@@ -350,6 +350,9 @@ hard edge at the threshold in the range of the chosen decibels.

 The filter accepts the following options:

 @table @option

+@item level_in

+Set input gain. Default is 1. Range is between 0.015625 and 64.

+

 @item threshold

 If a signal of second stream rises above this level it will affect the gain

 reduction of the first stream.

@@ -2479,6 +2482,9 @@ processing. See @ref{pan} and @ref{amerge} filter.

 The filter accepts the following options:

 @table @option

+@item level_in

+Set input gain. Default is 1. Range is between 0.015625 and 64.

+

 @item threshold

 If a signal of second stream raises above this level it will affect the gain

 reduction of first stream.

@@ -2514,6 +2520,9 @@ reduction. Default is @code{average}.

 Should the exact signal be taken in case of @code{peak} or an RMS one in case

 of @code{rms}. Default is @code{rms} which is mainly smoother.

+@item level_sc

+Set sidechain gain. Default is 1. Range is between 0.015625 and 64.

+

 @item mix

 How much to use compressed signal in output. Default is 1.

 Range is between 0 and 1.

@@ -38,6 +38,8 @@

 typedef struct SidechainCompressContext {

     const AVClass *class;

+    double level_in;

+    double level_sc;

     double attack, attack_coeff;

     double release, release_coeff;

     double lin_slope;

@@ -63,19 +65,21 @@ typedef struct SidechainCompressContext {

 #define F AV_OPT_FLAG_FILTERING_PARAM

 static const AVOption options[] = {

-    { "threshold", "set threshold",    OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0.125}, 0.000976563,    1, A|F },

-    { "ratio",     "set ratio",        OFFSET(ratio),     AV_OPT_TYPE_DOUBLE, {.dbl=2},               1,   20, A|F },

-    { "attack",    "set attack",       OFFSET(attack),    AV_OPT_TYPE_DOUBLE, {.dbl=20},           0.01, 2000, A|F },

-    { "release",   "set release",      OFFSET(release),   AV_OPT_TYPE_DOUBLE, {.dbl=250},          0.01, 9000, A|F },

-    { "makeup",    "set make up gain", OFFSET(makeup),    AV_OPT_TYPE_DOUBLE, {.dbl=2},               1,   64, A|F },

-    { "knee",      "set knee",         OFFSET(knee),      AV_OPT_TYPE_DOUBLE, {.dbl=2.82843},         1,    8, A|F },

-    { "link",      "set link type",    OFFSET(link),      AV_OPT_TYPE_INT,    {.i64=0},               0,    1, A|F, "link" },

-    {   "average", 0,                  0,                 AV_OPT_TYPE_CONST,  {.i64=0},               0,    0, A|F, "link" },

-    {   "maximum", 0,                  0,                 AV_OPT_TYPE_CONST,  {.i64=1},               0,    0, A|F, "link" },

-    { "detection", "set detection",    OFFSET(detection), AV_OPT_TYPE_INT,    {.i64=1},               0,    1, A|F, "detection" },

-    {   "peak",    0,                  0,                 AV_OPT_TYPE_CONST,  {.i64=0},               0,    0, A|F, "detection" },

-    {   "rms",     0,                  0,                 AV_OPT_TYPE_CONST,  {.i64=1},               0,    0, A|F, "detection" },

-    { "mix",       "set mix",          OFFSET(mix),       AV_OPT_TYPE_DOUBLE, {.dbl=1},               0,    1, A|F },

+    { "level_in",  "set input gain",     OFFSET(level_in),  AV_OPT_TYPE_DOUBLE, {.dbl=1},        0.015625,   64, A|F },

+    { "threshold", "set threshold",      OFFSET(threshold), AV_OPT_TYPE_DOUBLE, {.dbl=0.125}, 0.000976563,    1, A|F },

+    { "ratio",     "set ratio",          OFFSET(ratio),     AV_OPT_TYPE_DOUBLE, {.dbl=2},               1,   20, A|F },

+    { "attack",    "set attack",         OFFSET(attack),    AV_OPT_TYPE_DOUBLE, {.dbl=20},           0.01, 2000, A|F },

+    { "release",   "set release",        OFFSET(release),   AV_OPT_TYPE_DOUBLE, {.dbl=250},          0.01, 9000, A|F },

+    { "makeup",    "set make up gain",   OFFSET(makeup),    AV_OPT_TYPE_DOUBLE, {.dbl=2},               1,   64, A|F },

+    { "knee",      "set knee",           OFFSET(knee),      AV_OPT_TYPE_DOUBLE, {.dbl=2.82843},         1,    8, A|F },

+    { "link",      "set link type",      OFFSET(link),      AV_OPT_TYPE_INT,    {.i64=0},               0,    1, A|F, "link" },

+    {   "average", 0,                    0,                 AV_OPT_TYPE_CONST,  {.i64=0},               0,    0, A|F, "link" },

+    {   "maximum", 0,                    0,                 AV_OPT_TYPE_CONST,  {.i64=1},               0,    0, A|F, "link" },

+    { "detection", "set detection",      OFFSET(detection), AV_OPT_TYPE_INT,    {.i64=1},               0,    1, A|F, "detection" },

+    {   "peak",    0,                    0,                 AV_OPT_TYPE_CONST,  {.i64=0},               0,    0, A|F, "detection" },

+    {   "rms",     0,                    0,                 AV_OPT_TYPE_CONST,  {.i64=1},               0,    0, A|F, "detection" },

+    { "level_sc",  "set sidechain gain", OFFSET(level_sc),  AV_OPT_TYPE_DOUBLE, {.dbl=1},        0.015625,   64, A|F },

+    { "mix",       "set mix",            OFFSET(mix),       AV_OPT_TYPE_DOUBLE, {.dbl=1},               0,    1, A|F },

     { NULL }

 };

@@ -142,6 +146,7 @@ static int compressor_config_output(AVFilterLink *outlink)

 static void compressor(SidechainCompressContext *s,

                        double *sample, const double *scsrc, int nb_samples,

+                       double level_in, double level_sc,

                        AVFilterLink *inlink, AVFilterLink *sclink)

 {

     const double makeup = s->makeup;

@@ -151,14 +156,14 @@ static void compressor(SidechainCompressContext *s,

     for (i = 0; i < nb_samples; i++) {

         double abs_sample, gain = 1.0;

-        abs_sample = fabs(scsrc[0]);

+        abs_sample = fabs(scsrc[0] * level_sc);

         if (s->link == 1) {

             for (c = 1; c < sclink->channels; c++)

-                abs_sample = FFMAX(fabs(scsrc[c]), abs_sample);

+                abs_sample = FFMAX(fabs(scsrc[c] * level_sc), abs_sample);

         } else {

             for (c = 1; c < sclink->channels; c++)

-                abs_sample += fabs(scsrc[c]);

+                abs_sample += fabs(scsrc[c] * level_sc);

             abs_sample /= sclink->channels;

         }

@@ -174,7 +179,7 @@ static void compressor(SidechainCompressContext *s,

                                s->compressed_knee_stop, s->detection);

         for (c = 0; c < inlink->channels; c++)

-            sample[c] *= (gain * makeup * mix + (1. - mix));

+            sample[c] *= level_in * (gain * makeup * mix + (1. - mix));

         sample += inlink->channels;

         scsrc += sclink->channels;

@@ -208,6 +213,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)

     scsrc = (const double *)s->input_frame[1]->data[0];

     compressor(s, sample, scsrc, nb_samples,

+               s->level_in, s->level_sc,

                ctx->inputs[0], ctx->inputs[1]);

     ret = ff_filter_frame(outlink, s->input_frame[0]);

@@ -343,6 +349,7 @@ static int acompressor_filter_frame(AVFilterLink *inlink, AVFrame *frame)

     sample = (double *)frame->data[0];

     compressor(s, sample, sample, frame->nb_samples,

+               s->level_in, s->level_in,

                inlink, inlink);

     return ff_filter_frame(outlink, frame);